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Finding the Fourth Proportional to 8,661.77, 12,924.63 and 8,132.79

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Solution

The fourth proportional to 8,661.77, 12,924.63 and 8,132.79 is: 12,135.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.77 : 12,924.63 = 8,132.79 : x
  2. Step 2: Convert to fraction form
    8,661.77/12,924.63 = 8,132.79/x
  3. Step 3: Cross multiply
    8,661.77x = 12,924.63 × 8,132.79
  4. Step 4: Simplify right side
    8,661.77x = 105,113,301.62
  5. Step 5: Solve for x
    x = 105,113,301.62/8,661.77
  6. Step 6: Final answer
    x = 12,135.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.